Awning sheave-block.



No. 838,783. PATENTED DEC. 18, 1906. W. G. HALKETT.

AWNING SHEAVE BLOCK.

APPLIOATION-IILED JULY 20. 1905.

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\VILLIAM G. HALKETT, OF PHILADELPHIA, PENNSYLVANIA.

AWNING SHEAVE-BLOCK.

Specification of Letters Patent.

Patented Dec. 18, 1906.

Application filed July 20,1905. Serial No. 270,466.

To all whom, it may concern.-

Be it known that I, WVILLIAM G. HALKETT, a citizen of the United States, and a resident of the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Awning Sheave-Blocks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, of which Figure 1 is a side elevation of an awning having my invention applied thereto as in use. Fig. 2 is a side elevation of the block in which the invention is embodied. Fig. 3 is an edge elevation of the same. Fig. 4 is a greatly-enlarged section on line x 20, Fig. 1.

The object of this invention is to provide a simple and efficient means for obviating a certain difliculty frequently occurring in practice with the sheave or pulley blocks over which pass the usual ropes for raising and lowering an awningthat is to say, when the awning is thus being raised, especially when it has become wet, that part of the same immediately over the operating-rope sags and hugs partly around the latter and is drawn in by it (the rope) between the sheave and the top and side of the frame in which it (the sheave) is journaled. The result is that the raising of the awning is checked, and sometimes the part thereof thus drawn and wedged in becomes torn.

My invention consists in providing a connection between the side edges of the sheaveframe, or shell, as it is usually termed, that is adapted to act in the nature of a cam or wedge to open out the portion of the awning hugging the rope, so that said portion will instead of being drawn in, as before described, slide up on the sheave-frame or shell.

The invention also relates to the particular construction of the said shell.

In the drawings, 1 is the usual sheave, that is journaled in the shell 2. The latter has an eye 3, to which is connected a screw-eye 4 for securing the device to the windowframe 5. The rope 6 for operating the awning 7 passes over the sheave and beneath the awning and is connected to the free end of the usual pivoted supporting-frame 8 for the awning, as seen in Fig. 1.

In carrying out my invention, particular reference being had to Figs. 2, 3, and 4, I extend across the side edges of the shell 2 a connection 9 at such point as to leave a suitable eye or opening 10 for the passage of the rope 6. This connection 9 acts as a cam or wedge to open out the part of the awning that may be hugging the rope when the latter is drawn up to raise the awning, thus causing the said part to ride up upon the sides of the shell, as in Fig. 4, thus preventing the drawing in and wedging of the awning between the sheave and its shell or between the rope and the sheave. By flaring outwardly the sides of the shell 2 and the connection 9, as illustrated in Figs. 3 and 4, not only is the awning fabric spread farther away from the sheave than would be the case if the outeredges of said sides 2 were parallel with the pulley-block, but said flaring outer edges form a rounded surface continuous from the sides 2 of the connection 9, whereby should the rope connected to the awning be pulling at an angle to the sheaves, as is frequently the case, the said flaring portion will still deflect the awning from the rope and will also provide a rounded surface for the rope to run into the sheavegroove, thereby preventing jamming of the rope between the sheave and its shell. I have shown the connection 9 at each side of the shell 2. The same may be on one side only. It is, however, more convenient to have the connection on each side, because in such case it makes no difference which side or edge of the frame is next to the awning. The shell 2 is preferably made by striking the same up from a suitable blank of sheet metal, the upper ends 2 2 of the shell being bent over to overlap, as seen in Fig. 3, and the eye 3 is riveted to these overlapping ends, thereby securing them together. The shell made in this way is very cheap yet light and strong.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A sheave-block for awnings, having the connection between the sides of the shell, adapted to act as a wedge under the circumstances set forth the outer edge of said sides and connection being outwardly flaring, and In testimony whereof I have hereunto afconstituting a continuous rolpndpld surface. fixed my signature.

2. In a sheave-block of t e c aracter recited, the shell formed from a piece of suit- WILLIAM HALKEFJT' 5 able sheet metal with the overlapping upper Witnesses:

ends, and the usual eye riveted to and securing GEO. L. ROTE, said ends together, substantially as set forth. Tnos. D. MowLDs. 

